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    Normal human brain — Stock Photo
    Normal human brain
    Female patient undergoing computed tomography diagnostics. — Stock Photo
    Female patient undergoing computed tomography diagnostics.
    MRI scanning machine in scanning room at the hospital — Stock Photo
    MRI scanning machine in scanning room at the hospital
    Freshwater sponge (Spongilla sp.), coloured scanning electron micrograph (SEM). — Stock Photo
    Freshwater sponge (Spongilla sp.), coloured scanning electron micrograph (SEM).
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Long Hair Chinese woman holding a mug — Stock Photo
    Long Hair Chinese woman holding a mug
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Security guard standing under the scanning door in the airport terminal — Stock Photo
    Security guard standing under the scanning door in the airport terminal
    Cashier ringing up customer at supermarket checkout — Stock Photo
    Cashier ringing up customer at supermarket checkout
    Coloured scanning electron micrograph of activated platelets attached to surgical gauze. — Stock Photo
    Coloured scanning electron micrograph of activated platelets attached to surgical gauze.
    Coloured scanning electron micrograph (SEM) of the inner lining of the stomach (gastric mucosa). — Stock Photo
    Coloured scanning electron micrograph (SEM) of the inner lining of the stomach (gastric mucosa).
    Coloured scanning electron micrograph (SEM) of Asbestos fiberschrysotile type. — Stock Photo
    Coloured scanning electron micrograph (SEM) of Asbestos fiberschrysotile type.
    Fossilised fragment of a coccolithotrope skeleton — Stock Photo
    Fossilised fragment of a coccolithotrope skeleton
    Strands of Actinomyces viscosus — Stock Photo
    Strands of Actinomyces viscosus
    Woodland skipper butterfly compound eye — Stock Photo
    Woodland skipper butterfly compound eye
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes. — Stock Photo
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes.
    Pit formed on metal or semiconductor surface — Stock Photo
    Pit formed on metal or semiconductor surface
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot — Stock Photo
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Hospital radiologist sitting at desk in front of CT scans. — Stock Photo
    Hospital radiologist sitting at desk in front of CT scans.
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Chicken eggshell cross section — Stock Photo
    Chicken eggshell cross section
    Doctor holding digital tablet and patient lying on x ray machine in hospital — Stock Photo
    Doctor holding digital tablet and patient lying on x ray machine in hospital
    Strands of Actinomyces viscosus — Stock Photo
    Strands of Actinomyces viscosus
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    Streptomyces coelicoflavus bacteria — Stock Photo
    Streptomyces coelicoflavus bacteria
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Lactating breast tissue — Stock Photo
    Lactating breast tissue
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans — Stock Photo
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans
    Scanning electron micrograph (SEM) of sarcoma cells in culture. — Stock Photo
    Scanning electron micrograph (SEM) of sarcoma cells in culture.
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Cells of brewer yeast — Stock Photo
    Cells of brewer yeast
    Female patient going through x-ray test in hospital — Stock Photo
    Female patient going through x-ray test in hospital
    Coloured scanning electron micrograph (SEM) of Table sugar (sucrose) crystals. — Stock Photo
    Coloured scanning electron micrograph (SEM) of Table sugar (sucrose) crystals.
    Airport security officer using a hand held metal detector to check a passenger in airport — Stock Photo
    Airport security officer using a hand held metal detector to check a passenger in airport
    Blade of grass with a serrated edge — Stock Photo
    Blade of grass with a serrated edge
    Pubic louse, SEM — Stock Photo
    Pubic louse, SEM
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Radiologist recording results of CT scanning. — Stock Photo
    Radiologist recording results of CT scanning.
    Activated platelet from peripheral blood — Stock Photo
    Activated platelet from peripheral blood
    Cat flea head — Stock Photo
    Cat flea head
    Traveller using self service check-in machine at airport — Stock Photo
    Traveller using self service check-in machine at airport
    Illustration of abstract cancer cell with tentacles. — Stock Photo
    Illustration of abstract cancer cell with tentacles.
    Orchid (Phalaenopsis sp.) petal, coloured scanning electron micrograph (SEM). — Stock Photo
    Orchid (Phalaenopsis sp.) petal, coloured scanning electron micrograph (SEM).
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM). — Stock Photo
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM).
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth. — Stock Photo
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth.
    Colored scanning electron micrograph of cancer cells from human colon. — Stock Photo
    Colored scanning electron micrograph of cancer cells from human colon.
    Colored scanning electron micrograph of osteosarcoma bone cancer cell. — Stock Photo
    Colored scanning electron micrograph of osteosarcoma bone cancer cell.
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells — Stock Photo
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells
    Healthy human skin — Stock Photo
    Healthy human skin
    Silica wall of a diatom — Stock Photo
    Silica wall of a diatom
    Traveller using self service check-in machine at airport — Stock Photo
    Traveller using self service check-in machine at airport
    Mosquito head anatomy — Stock Photo
    Mosquito head anatomy
    Coloured scanning electron micrograph of Staphylococcus aureus bacteria. — Stock Photo
    Coloured scanning electron micrograph of Staphylococcus aureus bacteria.
    Primrose (Primula sp.) pollen grain, coloured scanning electron micrograph (SEM). — Stock Photo
    Primrose (Primula sp.) pollen grain, coloured scanning electron micrograph (SEM).
    Portrait of smiling doctor standing in x-ray room at hospital — Stock Photo
    Portrait of smiling doctor standing in x-ray room at hospital
    Coloured scanning electron micrograph of 293T cell in early stage of programmed apoptosis cell death. — Stock Photo
    Coloured scanning electron micrograph of 293T cell in early stage of programmed apoptosis cell death.
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot — Stock Photo
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot